Thomas midgley



(No Model.)

T. MIDGLEY.

WIRBBELTING. No. 386,335. Patent-,ed July 17, 1888.

N. PETERS, Phot-Lxmogrzpber, wawingwn. u.' C.

'l-NiTnn STATES PATENT Oi-ricao THOMAS MIDGLEY, OEY BEAVER FALLS7 PENNSYLVANIA, ASSIGNOR OF ONE-HALE TO JAMES E. EMERSON, OE SAME PLAGE.

WIRE BELTING.

SPECIFICATION forming part of Letters Patent No. 386,335, dated July 17, 1888.

Application filed February 13, 1883'. Serial No. 263,901. (No model.) A

T0 all whom it may concern:

Be it known that I, THoMAs MIDGLEY, a citizen of the United States, residing at Beaver Falls, in the county of.Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Vire Belting; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to wire belting, and has for its object an improvement in the belting shown in patents numbered 862,576 and 362. 577, May 10, and 371,181, October 11, 1887, granted to James E. Emerson and myself.

The object of my invention is to produce wire belting of great strength.

The invention will be hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, which form a part of this specification, Figurel represents an end view of a tube of coiled intersected wires. Fig. 2 is a plan of the same. Fig. 3 is a perspective view ofthe tube partly compressed to feed it between a pair of rolls. Fig. 4 is a plan ofthe belting after it has been rolled, and Fig. 5 is an edge view.

Reference being had to the drawings and the letters marked thereon, A represents the body of the belt, which is made of two thicknesses or layers, a b, of woven wire, which are formed by interwoven coiled sections c.

In manufacturing belting of my improved construction sections of coiled wire of a suitable length are interwoven by twisting or securing one section into another and forming a tube, B, as shown in Fig. 1. In screwing or interweaving the coiled sections they are made to terminate at different points in the circumference of the tube, to make the joints overlap and prevent the belting made from the tube having any point in it which shall be weakcned sufficiently to impair its strength. The sections c are usually of a length equal to about four times the circumference of the tube, and when one section has been screwed into the tube until its free end has been reached another section is applied and interwoven in like manner until a tube of any desired length corresponding with thelength of belt required has been woven.

It will be observed that the sections are interwoven at a right angle to the length of the tube, as shown in Fig. 1. been completed it is compressed horizontally and passed between a pair of rolls, the pressure of which elongates and flattens the links, as shown at d in Figs. 4 and 5, and forms belting of two separate layers or thicknesses, a b, and the edges ef are formed by doubling the two surfaces of the body at the points in the circumference of the tube which constitute the edges of the belting when rolled out and dattened. By this construction no ragged ends or strands of wire appear on the edges ofthe belting, while they are formed of a double thickness of longitudinal surfaces of links, as shown in Fig. 5.

In passing the tube through the rolls it is folded so as to bring the joints or broken ends of the coiled sections in about the center of one of the flat bearing-surfaces a b ofthe belting, to prevent any ragged ends from protrud` ing on either edge, and is kept under tension.

The tube orbeltingis prevented from spreading while being rolled by placing solid bars of metal of slightly less thickness than the rolled belting between the rolls while the tube or belting is passing through. The bars are set such a distance apart as to allow the tube to fold or double, but to prevent the coils or helices from spreading laterally.

By doubling the body of the belting not only are superior working-edges formed, but the belting may be made of much lighter wire than when only one thickness is used, thus greatly increasing its strength without correspondingly increasing its weight. To provide still greater strength, the sections ot' coiled wire may be increased to any desired number, thus making each thickness or layer a b cousist of two or more intersected coiled sections, c, one on top ot' the other. After the belting has been rolled it is tempered, and may then, if desired7 be coated or covered with rubber and the rubber rolled into the interstices between the links and canvas or rubber cloth After the tube hasv applied to the rnbber-coated surfaces; or the surfaces may be covered with canvas previously treated with a paint which becomes adhesive under heat and pressure.

The method involved in this invention forms subject-malter of another application, Serial No. 265,836.

Having thus fully described my invention, what I claim isl. Wire belting composed of interwoven transverse sections of wire presenting folded and unbroken edges, substantially as described.

2. Wire beltin g composed of two thicknesses 

